Header or like mechanism



y 1961 R. F. MITCHELL ETAL 2,983,152

Y HEADER OR LIKE MECHANISM Filed April 13, 1956 s Sheets-Sheet 1 I l I I I I INVENTORS M k g ATTORNEYS y 1961 R. F. MITCHELL ETAL 2,983,152

HEADER 0R LIKE MECHANISM Filed April 13, 1956 s Sheets-Sheet 2 y 1961 R. F. MITCHELL ETAL 2,983,152

HEADER 0R LIKE MECHANISM Filed April 13, 1956 3 Sheets-Sheet 5 INVENTOR5 United States Patent" Ofice Patented May 9, 1961 -cott, Conn., assignors, by mesne assignments, to Textron. Inc., Providence, R.I.,..a. crporati0n. of .Rhode Filed Apr. 13, 1956, Sex. N0.,578,071

'SIGaims. (CI; 74-38) This invention relates, to. a "header or like. mechanism and more particularly to, a machine for r-heading boltsor the likeafter a workpiece or blankhhasheen cutfrom a .lengthflof, rod stock. As illustratcdstheinvention is appliedtoa twoblow machine for this, purpose wherein a pair .ofpunches areasupported upon a-reciprocable gate, and .the .punches are shifted, from side to side in synchronism withthe movementof thcigateto align one punch with the'die of the machine upon onerstrokeand the second punch with the die on the succeeding stroke, it being understood thatthemaohineis provided with a'singlc die.

It is contemplated. by. .the invention to provide a machine of this, character wherein ,the movable gate which carries the ,punchesis operatedby atoggle mechanism, the toggle being opened ,and closed by amain crankshaft extending transversely. of the bed of the machine and located below, the toggle "links. By .this arrangement the crank Shaft which is a usualsource of vibration due to the eccentric throw of the crank is placed at a; low :point with respecttothetfioor, and hence the momentgof. the vibrating force is -reduced.

The construction of the toggle mechanism is such that the heading pressures are taken up by the'toggles and not transferred to the-crankshaft. Thus the-crank shaft may bemonnted-on-roller bearings and-driven at a higher speed than is-possible in;1machines wherein the crank is connected directly to the .gate. In .addition the gate 'is relatively wide and the punches are shiftedpin a horizontal direction. across the front .of the, gate, and novelmeans are providedfor effecting the shifting of the punches.

In additionto the above the improvements :have been made inother features of the machine such, for rexample, as the;.toggle :bearings, the construction 'of the; gate, and the wire stop and,,cut:olf mechanism, which will be described more particularlvhereinafter.

One tobjectxof the invention istoprovide a new and improved header mechanism which;=may "be operated at a relatively high speed A still further object of the invention is to provide a header or like machine wherein the gate is operated by a toggle mechanism, the toggle being actuated by a crank shaft mounted at a position adjacent the base of the machine or floor so as to lessen the vibration due to the operation of the machine.

A further object of the invention is to provide a header of the class described wherein a bushing or roll is provided between the toggle arms to apply the pressure to these arms upon the operative strokes of the machine and to provide improved means for shifting the punches on the gate in a horizontal direction during the reciprocation of the gate.

To these and other ends the invention consists in the novel features and combinations of parts to be hereinafter described and claimed.

In the accompanying drawings:

Fig. 1 is a topplan view of a header embodying our invention;

Fig. 2 is .a sectional View online 2-2 ofFig. 1;

Fig. 3 is a detail view. of one of the toggle arms with the mating arm being shown in dotted lines; and

Fig. 4. is a side elevational view of the toggle arm shown in Fig. 3.

To illustrate one embodiment of the invention, there is shown in'the drawings a header having a bed .or frame 10 upon the forward portion of which is mounted a die bed .11 (Fig. .2), carrying a die 12 having a die opening 13 adapted to receive the Work. 7

A knock-out rod 14' is mounted 'inthe die bed in the usual manner, this rod being operated by a lever .15

from a rod 16' which may be reciprocated in the usual manner. Also mounted on the bed of the machine (Fig. 1) is .ajpair of. feed rol1s17 adapted to be operated in any approved manner. to feed the rod stock 19 through the face of the die block againsta feed stop member 21.

The feed: stop 21 comprises a horizontal. arm 23 extending forwardly over. the bed and provided with elongated :openings 24 through which may be passed screws 25 toadjustably secure the stop to 'a block 26 secured to the bed. The position of the feed stop may be accurately adjusted by means of the adjusting screw 27 which bears against the same and which is threaded through a lug 28 secured to the block 26.

The gate is shown at Silin Fig. 2 and is mounted upon a gate, carrier slide51' to which it is secured andjkeyed by'the key 52.. .This slide is secured to a pair of "rods 53 whichjare slidablymounted in bearings 54 and '55 in the bed. ,As shown in Fig. 1, these rods are spaced a substantial-distance apartsothat thegate carrier, which itself is relatively .wide, .has a broad bear-ing in the frame.

The gate is actuated from the crank shaft-56 (Fig. .2) which carries "the crank 57. It may also be noted at-this point that this crank shaft drives the. side shaft 53 through the bevel'gears 59.

A connecting rod 60 (Fig, 2) is mounted upon the crank 57, the-upper end of which is bifurcated so as to provide spaced cars .61 (Fig. .1) through which, ex: tends a pin 62 which operates the toggle mechanism 'to be hereinafter described The toggle 'rnechanism which operates thegate comprises the two toggle arms .63 and. 64, the arm 63 being pivotally'connectedto the ;gateby the pin 65 and abush: ing 66 is disposed "between thepin and the adjaceutqsure face of the socket 67 in the gate in which the endof the toggle arm is received. It will be understood that the pin 65 has a relatively loose fit in the end' of the toggle so that-the latter will-abut the bushing 66 upon thebperativeor power stroke of'the gate/and relieve-pressure from the pin-65.- i i Similarly the toggle arm 64 is pivotally connected by the pin 68 to a block 69 adjustably mounted on the bed as will be hereinafter described, this block being provided with a socket 70 having a bushing 71 therein similar to the bushing 67 previously described in connection with the toggle arm 63. Here again the pin 68 has a relatively loose fit in the toggle arm 64 so that the end of the toggle arm will contact the bushing upon the power strokes of the toggle mechanism.

The block 69 is connected to the bed by means of a screw 72 which passes through an elongated opening 73 in a part of the bed and is threaded into the block. The latter may be adjusted by means of the wedge 74 mounted between the rear beveled edge of the block 69 0 and a portion 75 of the bed. The wedge may be moved toggle arms are provided with intermediate web portions 81 and 82, these portions being provided with arcuate sockets 83 and 84 (Fig. 2).. Within these sockets are mounted bushings .85 and 86, and a roll .87 embracesthe pin 62 andfits snugly against the bushings 85 and 86. a e

The pin 62 has a relatively loose fit in the roll 87 so as to take'the strain from this pin on the power strokes of the toggle mechanism, the force being transmitted from the roll directly to the'toggle arms to advance the gate. .7

It will be apparent that the gate is advanced twice during a complete stroke of the connecting rod 60 (that is upon a complete rotation of the crank shaft 56) as it will be advanced and withdrawn once upon the down stroke of the connecting rod and again upon the up stroke of the connecting rod. Also it may be noted that at the upper position of the toggle pin 62, shown in Fig. 2, it is at a slightly greater distance from the line joining the pins 65 and 68 than when the pin 62 is at its lowermost position. Thus the first or coning stroke otf'the gate is somewhat longer than the second or heading stroke. 1

As illustrated, two punches 88 and 89 are carried upon the gate, these punches being mounted upon punch holders 90 and 91 which are in turn adjustably secured to a carrier member 92 (Fig. '2). This carrier is slidably mounted to move transversely of the gate in a horizontal direction by means. of the dovetailed member 93 secured to the carrier and held against the front of the gate by the gibs 94 and 95. r i a V With the present construction it has been found expedient to mount the crank shaft 56 upon roller bearings in the bed. In this manner the shaft can be driven at a relatively high speed, this being possible by reason of'the toggle operation of the gate, as a result of which the reaction to the thrust of the gate is home by the toggle mechanism and not by the crank shaft as would be the case if the latter acted directly upon the gate. While we have shown and described one embodiment of our invention, it will be understood that it is notto be limited to all of the details shown, but is capable of modification and variation the spirit of the invention and within the scope of the claims. a

What we claim is:

1. Toggle mechanism connecting tworelatively movable members, said mechanism including a pair of pivoted toggle links to effect reciprocation of one of said members, a pivot pin connecting the adjacent ends of 4 said links, means connected to the pivot pin to actuate the toggle mechanism, the outer end of one toggle link being pivoted to one member, and the outer end of the other toggle link being pivoted to the other member, each of said toggle links having spaced arms provided with openings through which said pivot pin extends, and also being provided with a web portion between said arms, and'a member loosely mounted on said pivot pin with which said web member snugly engage to force said links outwardly when said pivot pin is actuated.

2. Toggle mechanism connecting/ wo relatively movable members, said'mechanism including a pair of pivoted toggle links to effect reciprocation 'of one of said members, a pivot pin connecting the adjacent ends of said links, means connected to the pivot pin to actuate the toggle mechanism, the outer end of one toggle link being pivoted to one member, and the outer end of the other toggle link being pivotedto the other member, each of said toggle links having spaced arms provided with openings through which said pivot pin extends, and also being provided with, a web portion between said arms, a member loosely mounted on said pivot pin with which said web members snugly engage to force said links outwardly whensaid pivot pin is actuated, said member comprising a cylindrical roller mounted rotatably on said pin between said arms, and said web members having socketed end portions engaging the periphery of said roller.

3. Mechanism as set forth in claim 2 wherein the outer end of each of said togglelinks is connected to the associated member by means of a pivot pin and each of said members is provided with a socket receiving the outer end of the associated toggle link, and a bushing is mounted in each of said sockets to abut the end of the toggle armseated therein to transmitforce from the toggle arm to said member andrelieve pressure upon the pivot pins.

References Cited in the me of this patent UNITED STATES PATENTS 223,487 Dalton Jan. 13, 1880 505,955 Peacock Oct. 3, 1893 665,725 Beker 'Ian. 8, 1901 1,239,052 Smith Sept. 4, 1917 1,360,842 Wilcox Nov.30, 1920 1,482,107 Blakeslee Jan. 29, 1924 2,186,030 ,Lester Jan.- 9, 1940 2,205,585 Wilcox June 25, 1940 2,258,093 Gastrow Oct. 7, 1941 2,595,433 Wilcox May .6, 1952 2,659,906 Watt Nov. 24, 1953 2,730,731 Schaetfer Jan. 17, 1956 2,851,888 Scholin Sept. 16, 1958 FOREIGN PATENTS V 289,178 Great Britain Apr. 26, 1928 502,875 Great Britain Mar. 24, .1939 

